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265c76dbc5
I added yet another one in 6d117d64a256234 but that new one is at the best place int he dependency graph and has the best name, so let's use that one for everything possible. types/lazy can't use it for circular dependency reasons, so unexport that copy at least. Updates #cleanup Change-Id: I25db6b6a0d81dbb8e89a0a9080c7f15cbf7aa770 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package loggerx provides logging functions to the rest of the syspolicy packages.
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package loggerx
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import (
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"log"
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"sync/atomic"
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"tailscale.com/types/lazy"
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"tailscale.com/types/logger"
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"tailscale.com/util/testenv"
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)
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const (
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normalPrefix = "syspolicy: "
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verbosePrefix = "syspolicy: [v2] "
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)
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var (
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debugLogging atomic.Bool // whether debugging logging is enabled
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lazyPrintf lazy.SyncValue[logger.Logf]
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lazyVerbosef lazy.SyncValue[logger.Logf]
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)
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// SetDebugLoggingEnabled controls whether spammy debug logging is enabled.
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func SetDebugLoggingEnabled(v bool) {
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debugLogging.Store(v)
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}
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// Errorf formats and writes an error message to the log.
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func Errorf(format string, args ...any) {
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printf(format, args...)
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}
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// Verbosef formats and writes an optional, verbose message to the log.
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func Verbosef(format string, args ...any) {
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if debugLogging.Load() {
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printf(format, args...)
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} else {
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verbosef(format, args...)
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}
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}
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func printf(format string, args ...any) {
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lazyPrintf.Get(func() logger.Logf {
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return logger.WithPrefix(log.Printf, normalPrefix)
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})(format, args...)
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}
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func verbosef(format string, args ...any) {
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lazyVerbosef.Get(func() logger.Logf {
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return logger.WithPrefix(log.Printf, verbosePrefix)
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})(format, args...)
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}
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// SetForTest sets the specified printf and verbosef functions for the duration
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// of tb and its subtests.
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func SetForTest(tb testenv.TB, printf, verbosef logger.Logf) {
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lazyPrintf.SetForTest(tb, printf, nil)
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lazyVerbosef.SetForTest(tb, verbosef, nil)
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}
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